Tap wrench and diestock



Feb. 19, 1924. v1,484,067

J. HIRST TA? WRENCH AND DIEsTocK Filed AlOIil 17. 1922 ullllllL PatentedFeb. 19, 1924.

. UNITED/STATES t weer 1 farlllarortica.

JAMES nms'r, or MELnosn, iyressaonnsn'rrs.

l TAP WRENCH an-n nrnsrocx.

Application filed April i7, 1922.` -Seral No. A554,241.`

To all whom t may concern:

Be it known that I, JAMES Hinsr, a. c1ti.

Zen of the United States, residing at Mels-` the quick and .convenientapplication,andre# moval of the jaws and the substitution of otherstherefor'.

The invention is embodied in the improve.- ments which I will nowproceed to describe and claim f j Of the accompanyingedrawings forming apant of this specilication--v Figure 1 is a side view of atool-embodying the invention, provided with jaws formed .as malescrew-thread cutting dies.

Figure 2is an edge view of the same, on a larger scale.

Figure 3 is a section on line 3#3 of Figure 2.

Figure 4 is a section on line 4-4 of Figure 3.

Figure 5 is a view similar to Figure 4, showing the jaw-securing barsdisplaced to release the dies. l

Figure 6 is a perspective View of the stock or holder, the dies, thedie-securing bars, and thel handles being removed.

Figure 7 is a side view of a pair of jaws, adapted to engage a tap.

The same reference characters indicate the saine parts in all of thefigures.

The body of my improved stock or holder is composed of duplicate sideportions 12, 12, and end portions 13 and 14, said portions bounding anopening 15, adapted to receive a pair of jaws 16. The jaws may haveacting portions 17, adapted to cut male screw threads on a bolt or rod,or may have acting portions 18, as shown by Figure 7, adapted to engagea tap. The side portions 12 are provided with slots 19, communicatingwith the opening 15, said slots having extensions 19a, extending throughthe end portion 14, and along the periphery of a boss 20, formed on saidend portion.

Connected by pivots 21 with the side portions 12, at one end of theholder, are two jaw-engaging bars or tongues having their freeendsreduced in 'width and provided withears 23 adapted toenter the por-Y tions. of the slot extensions 19%l that are formed in the-boss 20. Thejaws 16 are proT vided, lin opposite edges, with grooves-24 whichreceive the inner edges ofthe tong-ues 22, `,when `thetongues are intheir operative positions shown yby full lines in Figure y3.

lThe engagementofthe tongues with they jaw grooves confines thev jawsVagainst sidewise displacement, `and permits endwise movement of the jawsin the op.en3ing,15,

Iprovide mea-nsfor releasably .confining the tongues `22 in theiroperative positions,

said means. lbeing preferably embodied Vin a' tubular flange 26 formedon .a vhandle 27 L Said handle is provided vwith va screw.-

threaded shank 28,- enga-ged with a. tapped orifice in the boss- 20, asshown by Figure 3.l

The ears 23 are flush with the boss gwhen` the tongues are in their.operative positions,-

and the arrangement is such that when the shank 28,:1s screwed f nwar-d,the f1-auge 2.26 simultaneously overlaps and engages the ears 23, andconstitutes a keeper confining the tongues in engagement with the jaws.l/Vhen the shank 28 is screwed outward, the keeper simultaneouslyreleases the ears 23, so that the tongues may be swung outward, asindicated by Figure 5, and by dotted lines in Figure 3, to release thejaws and permit their sidewise removal.

To exert clamping pressure on the jaws when they are confined' by thetongues, I provide a handle 29, having a screw-threaded shank 30,engaged with a' tapped orifice in a boss 31, formed on the end portion13. The shank 3() projects into the opening 15, and abuts against oneedge of one of the Ijaws to press the same toward the other jaw.

The handles 27 and 29 project in opposite directions from the body, andenable the opv and end portions bounding an opening formed toreceive a.pair of jaws, the side portions being provided with slots communicatingwith said opening, and having extensions formed in one of the endportions, a pair of die-engaging tongues pivoted to the side portions atone end of the body, and having ears at their free ends, formed tooccupy the slot and a keeper Inovably engaged with said end portion andadapted to simultaneously engage said tongues and hold the same 'inposition to engage grooves in a pair of jaws inserted in said opening,and tosimultaneously release the tongues and permit the same t0 be swungoutward from ythe holder.

2. A stock or holder of the character stated, comprising a body composedof side and end portions bounding an opening formed to receive a pair ofjaws, the side portions being providedfwithv slots communioating withsaid opening, and having extensions formedv in one of the end portions,a pair of die-engaging tongues pivoted 't0 the side portions at one endof the body,

and having ears at their free ends, formed to occupy the slotextensions, one end portion of the body being provided with a bosscontaining portions of said slot extensions, a handle having ascrew-threaded shank engaged with a tapped orifice in said'boss, and akeeper movable by rotation of the handle to engage and release thetongue ears, the tongues being adapted to be swung outward from theholder when said ears are released.

3; A stock or holder of the character stated, comprising a body composedof side.

and end portions bounding an opening formed to receive a pair of jaws,the side portions being provided with slots Communicating with saidopening, and having extensions formed in one of the end portions, a pairof die-engaging tongues pivoted at the side portions at one end of thebody, and having ears at their free ends, formed to occupy the slotextensions, the end portions of the holder being provided with bosses,one of which contains portions of said slot extensions., said bossesbeing provided with tapped orifices, land a pair of handles havingscrew-threaded Shanks enn gaged with said orifices, and tubular flangesin sliding contacty with the bosses, one of said ianges constituting akeeper, adapted to engage and release the tongue ears, the

shank of the other handle being adapted to exert clamping pressure onthe dies, said handles being releasably secured in their operativepositions by the engagement of the screw-threaded shanks with lthetapped orifices of said bosses.

In testimony whereof I have affixed m signature.

JAMEs inner.

